- #1
redsox1701
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I need to lift 75 pounds when only using 4 pounds of force. Is there a gear set or pulley system that can do that?
Thanks
Thanks
Power Transmission, Gear, Pulley
- Thread starter redsox1701
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- Gear Power Pulley Transmission
Click For Summary
Discussion Overview
The discussion revolves around methods for lifting a weight of 75 pounds using only 4 pounds of force, exploring various mechanical systems such as gears, pulleys, and other lifting mechanisms. Participants also touch upon the application context, including a specific use case involving an electric bicycle.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
- Conceptual clarification
Main Points Raised
- One participant inquires about the feasibility of a gear set or pulley system to lift a specific weight with minimal force.
- Another suggests researching block and tackle systems as a potential solution.
- Some participants note that while block and tackle is a common approach, the effectiveness may be compromised by friction, potentially requiring a complex setup with many parts.
- Alternative methods proposed include using an electric winch, a lever, or hydraulic systems.
- A later reply introduces a novel idea of using a Tesla turbine as a torque converter in an electric bicycle, questioning the practicality of using viscous oil for torque transfer.
Areas of Agreement / Disagreement
Participants express a variety of approaches to the lifting problem, with no consensus on the best method. There are competing views on the effectiveness and practicality of different systems, and the discussion remains unresolved regarding the optimal solution.
Contextual Notes
Details about the specific application and constraints are limited, which may affect the evaluation of proposed solutions. The discussion also highlights the potential complications introduced by friction in mechanical systems.
Who May Find This Useful
Individuals interested in mechanical engineering, physics of machines, or those working on practical applications involving lifting mechanisms may find this discussion relevant.
- #2
Averagesupernova
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Research the block and tackle.
- #3
Pkruse
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Lots of ways to do that. The question is which means works best for this application. But then you have not told us anything about this application except the input and the output.
The idea to look into block and tackle design is a good one, and the most obvious. But by the time you figure in friction you are probably looking at 20 parts of line or more. That many parts creates other problems that might drive you to a different lifting method. This is the point where more details would be useful.
The idea to look into block and tackle design is a good one, and the most obvious. But by the time you figure in friction you are probably looking at 20 parts of line or more. That many parts creates other problems that might drive you to a different lifting method. This is the point where more details would be useful.
- #4
crazyswede
- 4
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electric winch with a 3lb button 
- #5
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Simplest of all, a lever.
- #6
Mech_Engineer
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Hydraulics!
- #7
inspiredape
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Hi I am building an electric bicycle and I want to use a high rpm(6-8000 rpm) brushless motor. the gear reducers I've found have not been able to hande more than about 4000rpm. I was wondering if anyone has heard of using a tesla turbine as a sort of reduction/torque convertor. My idea is to make something that looks like a clutch with input and output disks stacked and sandwiched with low tolerance in some sort of viscous oil and use the surface cohesion to transfer torque. In my mind the molecules of oil would roll against each other and create a kind of planetary like reduction. Is that completely ridiculous?
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